/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.alibaba.dubbo.rpc.cluster;

import com.alibaba.dubbo.common.extension.SPI;
/**
 * 合并结果扩展
 * 说明：合并返回结果，用于分组聚合
 * 内容详见：http://dubbo.apache.org/zh-cn/docs/dev/impls/merger.html
 * 
 * 已知扩展：
 * 		ArrayMerger
 * 		ListMerger
 * 		SetMerger
 * 		MapMerger
 */
@SPI
public interface Merger<T> {

    T merge(T... items);

}
